Art of molding.



B. L. WEAVER.

ART 0F MOLDING.

APPucATmN man was, 191s.

Patented July 10, 1917.

2 SHEETS-SHEET l.

Patented my 10, 19m

2 SHEETS-SHEET 2.

BENT L. WEAVER, OF HARRISBURG, PENNSYLVANIA.

ART OF IlVIOLDINGr.

'To all 'lr/10m. it may concer-n.'

Be it known that l. Baar L. lVnAvini, a citizen of the United States. residing at Harrisburg. in the county otl Dauphin and State of Pennsyhf'ania, have invented certain new and useful Iinprovei-nents in the Art of Molding, of which the following is a specification.

My invention relates to improvements in the art of molding. The object of' my invention is to provide a. novel and improved art or process. by the. aid of which patterns heretofore too long or too large to be molded in molding machines and heretofore requiring skilled labor to mold them. ma)v be molded in separate sections on a molding niachine with unskilled labor; and thereafter secured together to form a complete mold of the entire pattern to be cast.

With this object in view my invention consists of the novel and improved art or process of molding hereinafter fully described and claimed.

In the drawings,

Figure 1 is a perspective view of a flask having a mold formed therein. and by the aid of which my improved art or process may be performed.

Fig. 2 is a perspective View of one of the sections of the drag of the flask, having a section of a mold formed therein.

Fig. 3 is a plan View of the complete drag of the flask having a sectional mold of a complete pattern formed therein, and showing the sections of' the complete pattern placed within the corresponding sections of the'niold therein, for the purpose .of illustrating the relationship between the pattern sections and the mold sections.

Fig. 4 is a transverse section of the flask and mold and pattern therein, on line 4.-1 of Fig. 1.

Fig. 5 is a longitudinal section of the flask and mold and pattern therein, on -line 5v5 of Fig. 1.

Referring to the drawings, the flask con prises a cope 2 and a drag 3, separable from each other on a horizontal plane and detachably secured together by means of bolts 6 which extend through. outwardly projecting flanges of the cope and drag.

The cope 2 comprises side walls 7 and end walls 8 which abut against the ends of the side walls 7 and which are secured thereto by means of bolts 9'. The side walls 7 are Specification of Letters Patent.

Patented July 1t), 1917.

1916. sei-mino. 113.693.

each formed ot' separable sec-tions 10 which are in horizontal alinement with each other and which are detachably secured together by suitable bolts 11 which extend :through fianges on the sections 10. The cope 2 is provided with suitably spaced bars 12` which extend between the opposite sections 10 of` the side walls 7 thereof and which are secured thereto and which serve to stien the iask and strengthen the body of sand contained therein.

The drag 3 comprises side walls 13 and end walls .14 which abut against the ends of' the side walls 13 and which are secured thereto by suitable bolts 15. The side Walls .13 of the dra-g 3 are each formed in separable sections 16 which are in horizontal alinement with each other and which are detachably secured together by means of boltsV 17 extending through flanges on the sections 16. The drag 3 isprovided with a sectional bottom wall 18 each section 19 of which extends between two oppositely disposed sections 16 of the two side walls 13. The sections 19 of the bottom wall 18 are provided with suitable strengthening ribs, as shown, and are secured to the sections 16 of the side walls 13 of the drag 3 by means of bolts 20 which extend through the sections of the bottonrwall 18 and the flanges on the sections 16 of the. side walls 13. The bottom wall 18 serves to support the sand within the drag 3.

The cope 2 may be divided into separate sections at the joints between the sections 10 of its side walls 7, each two oppositely disposed sections 10 of the side walls 7 formingrr the side walls of a section of the cope; and the drag 3 also may be thus divided into separate sections at the joints between the sections 16 of its side walls 13, each two oppositely disposed sections 13 forming the side walls of a section of the drag. The sections 10 of the sidewalls 7 of the c'ope 2 register with and are in vertical alinement with the sections 16 of the@ side walls 13 of the drag 3 and they sections of both the cope and the drag are separable from each otheron the common vertical planes indicated by the lines 21-21 in Fig. 3. The end walls 8 of the cope 2 register with and are in vertical alinement with the end walls 14 of the drag 3. as shown; and the end walls 8 and 14 of the cope 2 and drag 3, respectively. are provided with outwardly-projecting trnnnions 22 for a purpose hereinafter appearing.

1t will be observed that the sections l0 of the side walls 'i of the cope .2 are duplicates ot' each other and of the sections lt' of the side. walls 13 o't' the drag so that one sec tion may be. interchanged or ma)v be substituted for another section of either wall 7 or lfi. as desired; and it will also be observed that the end walls S of the cope 2 are dupli Oates of the end walls Il ofl the drapv I so that the said end walls may be inter-changed or substituted one for another.

The sect-ions 1U and lt of the side walls T and 13 of the cope 2 and drag il, respectively, are provided with holes 2?) which are adapted to register with each other and to receive suitable dowel pins, not shown. for the proper setting ot' the sections of the flash with relation to each other and with relation to the parts of a molding machine.

My improved art of molding by the aid of the flask hereinbefore described is as tollows: l

1 have herein illustrated a pattern of a locomotive frame extending through the three seetionsof theV drag 3 and indicated at 24, in Figs. 2 and 3. This pattern is separated into three sections on vertical planes corresponding with the lines 21 in Fig. 3, the

- sections being separable from each other and the corresponding end faces of the pattern sections abutting against each other at the kplanes or lines 21. when forming the com` plete pattern to bc molded. ln making the mold ot' this pattern. the cope and the drag of the flask hereinbeiore described are separated. the sections thereof are also separated on the vertical planes 21-21 and the sections 16.01 the bottom wall are removed from the drag. This being done, the first section ot the drag is provided with a temporary end wall Q5 which abuts against the ends of the v sections 1G forming its side walls which previousl)7 abutted against other similar sections of the side walls 13 of the drag 3, the temporary end wall 25 being a duplicate of the end wall 14. The first section of the pat tern Q4 for the mold is now properly placed on the mold board or pattern frame of a molding machine, and the first section of the drag, with the. temporary end wall Q5, as illustrated in Fig. 2, is then properly placed on the mold board of the molding machine and around the section ofthe pattern Qllwith the temporary end wall .25 against the end of the pattern section which registers with a similarpend wall of another pattern section in forming the complete mold cavity, as illustrated, at 24a, by the mold formed in the sand in Fig. 2, sand is introduced to the drag section thus placed, and the mold of the first section of the locomotive frame is formed Within the drag section, in the usual manner with the aid of the molding` machine. A section 19 of' the bottom wall 18 is then placed upon th(` top of the drag section on the. machine and bolted thereto. The drag' section is then inverted on the trunnions 22 and the pattern olf the first section of'v the mold withd `awn from the drag seetion, leaving the mold Q1 therein. as illustrated in Fig. The firstI drag section is then placed upon a suitable. support and the temporary end wall 5 is relumed therefrom. The second section ofthe pattern of the mold is now placed upon the mold board ot' the molding machine. temporarv end walls similar to the wall 25 are now bolted to the. ends of' the side wall sections 1G ot the second section of the drag 3 to temporarily close the ends thereof. This second section of the drag is now placed on the molding machine around the second section of the pattern with the temporary end walls against the ends ot the. pattern section which register with similar end walls of the adjacent sections in formingthe. complete pattern and the second seetion ot" the pattern is molded therein similar to the molding of the first. pattern section. as previously described. The second drag seetion is now removed from the molding machine. the temporary end walls are removed therefrom and it is placed 0n a. support adj acent to the first drag section and bolted thereto with the mold of the second pattern section in registry with the mold of the first pattern section, as shown in Fig. 3. The mold of the third and final pattern section is now formed in the third and final section ofl the drag` similarly to the formation ol the mold of the first pattern section. as previously described, and the final drag- .sect-ion is bolted to the second drag section with the mold of the final pattern section in registry with the mold of the second pattern section. and the mold of the entire pattern in the drag 3 is then complete, as shown in Fig. 3.

The side and end walls of the cope 2 are exactly like the side and end walls ot' the drag 2; and, in making the cope section of the mold, the operation of making the drag scc,

tion, previously described. is followed with the exception that no bottom plate sections are secured to the cope sections and no pattern sections are molded in the sand in the cope sections. After thc complete cope section 2 has been formed it is placed upon the drag section 3 and bolted thereto, forming the complete. mold, as shown in Fig. l. The sand of the cope section of' the mold is provided with suitable risers or heads R and also with a suitable pouringgate G for the introduction of the molten metal to the mold.

The sections of the side Walls of the cope 2 and drag 3 are not only interchangeable but they are reversible. Also the end Walls of the cope 2 and drag 3 are not only interchangeable but reversible. It will thus be section of a flask may be readily constructed with any of the end Walls or side wall sections of the entire flask.

The flask may be constructed any desired length to suit different patterns, by employing more or less of the flask sections as the circumstances of' the particular case may require.

I claim:

l. The art of molding which consists in forming a pattern in separable sections having correspondingr end fac-es and which form a complete pattern when the corres}')onding end faces thereof arc brought into registry with each other, separately placing the pattern sections within suitable mold forming f flasks with the said end faces against removable Walls of the flasks which are arranged opposite to the other Walls of the lflasks, placing sand within said flasks and forming separate mold sections of the patternvsections, removing the pattern sections from the mold sections, removing the said removable walls from the mold sections, and assembling the separately formed mold sections with the molds of the pattern sections therein in registry with each other and thereby forming a mold of the complete pattern. I

2. The art of moldingwhich consists in form ing a pattern inseparable sections having corresponding end faces and which form a complete pattern When the corresponding end faces thereof are brought into registry with each other, separately placing thepattern sections Within suitable mold forming flasks with the said end faces against removable walls of the flasks which are arranged opposite to other walls of the flasks, placing sand within said flasks and forming separate mold sections of the pattern sections, removing the pattern sections from the mold sections, removing` the said removable Walls from the flasks, and securing the said flasks together with the separately formed mold sections therein in registry with each other and thereby forming a. mold of the complete pattern.

3. The art of molding which consists in forming a pattern in separable sections having corresponding end faces and which form a complete pattern when the corresponding end faces thereof are brought into registry with each other, separately placing the pattern sections upon suitable supports and Within suitable mold forming flasks which surround the sections and extend upwardly from the supports and which have removable Walls against the said end faces of the pattern sections, placing sand Within said flasks and forming separate mold sections of the pattern sections, placing mold supporting plates upon said flasks and securing them thereto, inverting said flasks and said supports, removing said supports and said removable Walls from said flasks, and securing the said flasks together With the separately formed mold sections therein in registry with each other and thereby forming a mold of the complete pattern.

In testimony whereof l aflix my signature hereto.

` Beur L. Wnavnn. 

